LibGuides: AMA Help (10th Edition): When Author/Title/Date is Missing

Other Material Without Named Author(s) or With Named Authors and a Group Name

Reference may be made to material that has no named author or is prepared by a committee or other group. The following forms are used:

Eye Diseases Prevalence Research Group. Prevalence of age-related macular degeneration in the United States. Arch Ophthalmol. 2004;122(4):564-572.
Centers or Disease Control and Prevention (CDC). Prevalence of receiving multiple preventive-care services among adults with diabetes-United States, 2002-2004. MMWR Morb Mortal Wkly Rep. 2005;54(44):1130-1133.

AMA Manual of Style (AMA, 2007, pg. 51).

Year of Publication

If the book has been published but there is no year of publication available, use "date unknown" in place of the year. Use the full year (eg, 2006), not an abbreviated form (eg, not 06 or '06).